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. 2006 Apr;97(4):549–557. doi: 10.1093/aob/mcl001

Table 3.

Stomatal conductance for water vapour (gs) and intercellular CO2 concentration (Ci) at 25 °C under growth CO2 concentration, and leaf nitrogen content per unit area (Narea) for rice grown at ambient CO2 (370 µmol mol−1) and at elevated CO2 (570 µmol mol−1)

gs (mol m−2 s−1)
Ci (µmol mol−1)
Narea (g m−2)
Year Measurement date Ambient FACE Ambient FACE Ambient FACE
2003 18–24 June 0·23 ± 0·05 0·23 ± 0·07 268 ± 16 435 ± 30*** 1·91 ± 0·26 1·95 ± 0·17
15–25 July 0·27 ± 0·09 0·16 ± 0·03* 283 ± 13 420 ± 15*** 1·89 ± 0·19 1·78 ± 0·14
20–30 August 0·28 ± 0·07 0·18 ± 0·03** 282 ± 12 441 ± 20*** 2·12 ± 0·18 1·73 ± 0·14**
11–15 September 0·27 ± 0·09 0·20 ± 0·07 298 ± 17 449 ± 30*** 1·33 ± 0·07 1·25 ± 0·12
2004 23–28 June 0·34 ± 0·05 0·32 ± 0·04 292 ± 3 464 ± 9*** 2·17 ± 0·17 2·18 ± 0·11
21–26 July 0·32 ± 0·06 0·30 ± 0·04 293 ± 12 458 ± 18*** 1·95 ± 0·23 1·94 ± 0·08
21–23 August 0·41 ± 0·07 0·44 ± 0·10 318 ± 4 499 ± 10*** 1·88 ± 0·10 1·60 ± 0·15**
14–18 September 0·25 ± 0·03 0·20 ± 0·03* 329 ± 6 509 ± 11*** 0·97 ± 0·08 0·96 ± 0·06

Means ± s.e. (n = 6) are shown. Asterisks indicate significant differences between CO2 treatments: ***, P < 0·0001; **, P < 0·01; *, P < 0·05.